Printed matter – Calendar
Patent
1978-02-10
1980-01-22
Briggs, William R.
Printed matter
Calendar
40 2R, 156279, 156344, 283 8R, 427 7, 427207C, 428916, B42D 1500
Patent
active
041847016
ABSTRACT:
This invention relates to tamper-proof labels useful for marking objects in a manner such that, if one were to attempt to transfer the label to another object, the label would be destroyed or defaced to such an extent that its transference would be noticeable.
The label comprises a laminate comprising a transparent or translucent outer sheet having an information containing pattern printed on its inner surface, said printed film having a discontinuous coating of transparent plasticized organic polymeric material thereon, with said printed and coating surface having a coating of a color containing pressure sensitive adhesive film thereon. The plasticizer in said organic polymeric material being a non-reactive, migrating plasticizer, which is also a plasticizer for said pressure sensitive adhesive.
Once applied to a substrate, if removal of the label is attempted, the label delaminates in a manner such that at least portions of the colored adhesive in register with the transparent discontinuous plasticized polymer coating remain on the substrate to which the label has been adhered resulting in a label which has a visually perceptible tamper-indicating change in at least portions of its background color.
In a preferred embodiment the free side of the adhesive film of the label is covered by a release sheet.
REFERENCES:
patent: 3364049 (1968-01-01), Peak et al.
patent: 3631617 (1972-01-01), Pekko
patent: 3864855 (1975-02-01), Pekko
patent: 4057919 (1977-11-01), Gauch et al.
patent: 4082873 (1978-04-01), Williams
patent: 4121003 (1978-10-01), Williams
Franklin Priscilla S.
Jones Frederick L.
Briggs William R.
Monarch Marking Systems, Inc.
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